Vanessa Hudgens

r4 card and Dsi doesn\’t work anymore?

Hi!
I got a r4 card and in the place they put lots of games in it and THEN gave it to me so i didn’t worry about it.. now i moved to another country (so i can’t ask THEM for help) and i updated my dsi and my r4 card doesn’t work anymore!
I don’t know anything about it.. how do you get it in the computer?? and how can i get it to work on my Dsi again? please help me will ya? (:

Thanks